Circuit for coin-collectors.



No. 845,111. PATENTED FEB. 26, 1907.

J." L. MOQUARRIE.

CIRCUIT FOR COIN COLLECTORS.

APPLICATION rnmn man. 1906.

WFL (6 I coin-receiving apparatus.

' mg apparatus.

UNITED STATES "PATENT OFFICE.

ELECTRIC COMPANY, OF OHIOAGQILLINOIS', A CORPORATION OF ILLI- NOIS.

CIRCUIT FOR COIN-COLLECTORS- Specification of LettersJPatent.

Patented Feb. 26. 1907.

Application filed FebruaryIS, 1906. Serial No. 300.930.

To all whom it may concern:

Be it knownthat I, JAMES L. MCQUARRIE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Circuits for Coin-Collectors, of which the following ,is a full, clear,

concise, and exact description.

My invention relates to a coin-collecting telephone system; and its object is to provide an Improved arrangement of line-and-cord circuit for use with coin-collectors where the de osit ofone or more coins may be required.

, y invention provides means for testing to determine whether the subscriber has de-' posited the coins required of him, and also means for enabling the operator at the central ofiice to refund the coins or deposit them in the cash box without aid from the subscriber. v

One feature of my lnvention consists of a differential test-relay which is in a balanced condition when the requisite number of coins have been deposited bythe subscriber, but which is otherwise in sin-unbalanced condition, said relay controlling a signal at the central oflice.

A further feature of my invention consists of a relay at the subscribers station,-control- 'ing a shunt about coin-actuated contacts,

whereby the operator is enabled to dispose, in the usual manner, of coins deposited in the My nvention may be readily understood by reference to the accompanying drawing, which Isa diagrammatic view showing a lineand-cord circuit embodying my invention} .and illustrating, by means of conventional symbols, the apparatus at a subscribers station and at the central ofiiee.

The cord-and-line circuit in connection with which I have chosen to illustrate my invention are of well-known types and hence a detailed description of the familiar features thereof is unnecessary. v

Referring to the drawing, the branch circuit g from the tip side of the line is provided with the usual polarized magnet M for contro'llin the disposal of a minor coins klc, de-

osite by the subscriber in his/coin-receiv- Two sets of coin-actuated contacts a b are included in the branch cir cuit, the former being normally open and the latter normally' closed. The deposit of the first coin 7c closes contact a and grounds said branch circuit, thereby operating signal L at the central office in the usual manner. In cases where two coins are required for a connection the deposit of the second coin is opens the contact I).

The lighting of the lamp L indicates in the usual manner the deposit of the first coin. By operating the test key c the operator at the central oflice can determine whether or not a second coin has been deposited in response to her re uest.

A differential y-wound relay R has one winding on each side of the common battery B. When thete st-key c is operated,the circuit is closed from the positive-terminal of the grounded battery B through one winding of the relay R, the tip side of the line, through the subscribers set, the ring side of the line,

the other winding of the relay R to the negative terminal of the battery. In case the second coin has been deposited, removing the ground from the branch circuit g, the differential relay R is balanced, and hence does not attract its armature, and contact 1 remains open. The lamp L therefore does not light, and the operator is informed thereby that the second coin has been deposited. In case the second coin has not been deposited the branch circuit 9 is grounded through cirtact b, and, as is apparent, the relay R being unbalanced its armature closes contact 1',

and lam L is lighted.

Inor er that when posited they may be refunded to the sub-, scriber or-directed to the 'cash box iii the u'suual manner by the operator atthe central ofiice operating-key e or f, respectively, I have provided means for closing the branch circuit 9 to ground when the subscriber hangs up hisreceiver. A shunt about contact b is normally closed. The shunt-circuit is controlled at contactd, however, by the re- "set, and which therefore attracts its armature when the subscribers receiver-is off its hook. Said shunt-circuit is open at contact 11 when the subscriber is requesting a connection, and does-not interfere, therefore, with the proper testing for the second coin by the operator at the central ofiice, as previously described. the' subscriber hangs up two coins have been de lay R which is in series with the subscribers in said branch circuit for controlling the disat thelcentral oflice controlled'by said relay,

said branch circuit.

with the subscribers set adapted to control including a source of current and a sub extending from a subscribers station to a 2. The combination with a telephone-line including a source of current and a subscribers set, of a coii'i-receiving apparatus, a branch circuit of the telephone-line having switches actuated by coins deposited in the coin-receiving apparatus, an electromagnet posal of saidcoins, and arelay connectedthe continuity of said branch circuit.

3. The combination with atelep'hone-line scribers set, of a M nn-receiving. apparatus, a

branch circuit of the telepl'ione-line having a switch adapted to be opened and a switch adapted to be closed by coins deposited in said' coin-receiving apparatus, a shunt about said latter switch, and a relay in series with the subscriber's set adapted to controhsaidshunt.

, 4. The con'ibination with a telepl'lone-line extending troin a subscribers station to, a

central oilice, of a branch circuit at the sub scribers station having coin controlled con' tacts, a difl'erentially-wour1d relay for testin the continuity of said branch circuit, a signa and means for connecting the winding of the relay withv the terminals of said telephoneline.- v M 5. The combination with a telephone-line" central office, of a: grounded branch circuit havin' coin-controlled contacts, a diiferenti'ally-wound test-relay, a circuit therefor including'a battery, one pole of which is grounded, the windings of said relay being on E opposite sides of the battery, a signal at the central o'l'li'ce controlled by said relay, and i means for connecting the circuit of said relay with the terminals of said telephone-line.

6. The combination with a telephone-line extending from a; subscribers station to a central ollice, of a coin-receiving apparatus at the subscribers station, a branch circuit of the telephone-line having a switch adapted to be opened and a switch adapted to be closed by coins deposited in said coin-receiving apparatus, a differentially-wound relay for testing the continuity ofsaid, branch circuit, a signal at the central oiiioe controlled by said relay and means for connecting the windings of the relay with the terminals of said telephone-line.

7. Ina telephone systemya telephone-line extending from a subscribers stationto a central o'l'Iice, a coin-receiying appara-tusat the subscribersstation, a branch circuitof the telephone-line having contacts controlled by coins deposited insaid coin-receiving apparatus, an electromagnet in said branch circuit for controlling the disposal of said coins, a relay connected with the subscribers set and adapted to control the continuity of said branch circuit when coins have been depos ited to actuate said contacts, a difl'erentially .w'ound relay for testing for said coins, a sigal at the central ollice controlled by said relay, and means for connecting the windings of the test-relay withthe terminals of the telephone-line.

8. Theoor'nbination with a telephone-line extending from a subscribers station to. a central oi'lice, of a coin-receiving apparatus atthe subscribers station. a grounded branch circuit of the'telephone linehaving a switch adapted. to be opened and a switch adapted to be closed by coins deposited in said'coinreceiving apparatus, a v dif'lerentially-wound test-relay, a circuit therefor including abattcry, one pole of which is grounded, the windings ott said'reiay being on opposite sides of the'battery, a signalat the central oiiice controlled by said relay; and means for connecting the circuit of said relay with the ter- IIIlIIfilS Of saidtelephone-line.

Inwitness wlrercofjI hereunto subscribe my name this 7th day of .February, A. I).

I JAMES L1 MCQUABRIE Witnesses; y I

GEO. \Vrnus P enom, FRANK C. LocKwoon. 

